... PE,PP PB ,ABS,PE-X,PP-R,PP-B and other kinds of polyolefin materialsSuitable for manufacturing PP-R pipes ... ,PP-B pipes ,alnuminum-plastic pipes,and sillicon-core pipesSuitable for manufacturingPP.PS,PET sheet materials ... –diameter ratio is 25:1,36:1The screw stem and the machine body are both treated with long-period gas ...